Plants for koi

Discussion in 'Goldfish and Koi' started by AccidentalFishFriend, Jul 30, 2015.

  1. So, I've got two young eight-inch koi in a 180 gallon tank right now. They'll be moving out to a larger pond (they outgrew the first one) once we manage to get it set up. In a previous tank, I let cladophora algae grow on rocks and driftwood so they could graze on that, and regularly sacrificed hornwort, duckweed, etc. to them. They're voracious. I had once read that java fern was unattractive to them, but they disproved it by ripping it to shreds. ;)

    We seem to have stupidly high nitrate levels straight out of the tap, so I always do try to keep planted aquariums. My two pretty monsters won't let me get away with that anymore. Right now, I'm hanging aquaponics baskets into the tank and giving them more sacrificial plants to take care of this. In the meantime, I'm wondering whether I can find something they'll leave alone. My water parameters are quite good, but it's a lot of work. I'm currently considering some really odd options: a small mangrove or two, or possibly papyrus. Does anyone have suggestions for a koi-proof plant until I can get them outside? Many thanks!
  2. TheyJustWantedGoldfish

    TheyJustWantedGoldfish Active Member

    I don't have koi, but I have goldfish that are about the same size. They will destroy anything green. Even if they don't eat it, the fish will rip up the plant just for fun. I've even had a nice long talk with them to no avail.

    Anubias might work, but probably does not clean the water as much as you'd like.

    You could consider using some sort of divider with holes or slits for water flow to keep the fish separated from the plants, so you still get the improved water quality without the destruction. Or use floating plants in a clear floating container that you tie to something to keep the fish out?
  3. Great suggestions! I did the divider thing for a bit (plastic canvas). I also did net bags over the plants. It worked fairly well, but the water circulation was impaired. Ah, well.

    I have some huge comets, too. I love them, but argh. We agree to have moss that they keep mowed. ;)

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